Using a multi-criteria analysis to identify rivers with hydromorphological restoration priority: Braided rivers in the south-eastern Subcarpathians (Romania)

Ioana-Toroimac, Gabriela; Zaharia, Liliana; Minea, Gabriel; Moroșanu, Gabriela Adina

doi:10.1016/j.scitotenv.2017.04.209

Cited by 14 publications

(7 citation statements)

References 49 publications

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“…In the present study, the values resulted from low-to medium levels of conservation in general, even in the regions closer to the water bodies. Therefore, the factors elaborated by Ioana-Toroimac et al (2017), if adapted to the factors considered in the present study, can present considerable levels of environmental conservation near the water bodies. This is a suggestion for future works.…”

Section: Resultsmentioning

confidence: 96%

“…In general, the best results of conservation adequacy were found in the proximity of the higher values of relief, slope, occupation by native vegetation and presence of hydromorphic soils. In the study by Ioana-Toroimac et al (2017), priority rivers were identified for hydromorphological restoration in Romania based on multicriteria evaluation. The factors were designed to recognize human pressures, channel changes and fluvial functionality.…”

Section: Resultsmentioning

confidence: 99%

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Defining environmental conservation levels considering anthropic activity in the Uberaba River Basin protected area

Santos

Silva²,

Assis³

et al. 2019

Rev. ambiente água

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Environmental conservation of river basins in general is essential for water quality and ecological maintenance, especially in spring areas. Despite being characterized as a Conservation Unit (CU) of Sustainable Use (SU), the Uberaba River Basin highlands are highly influenced by anthropic activities. The aim of this study was to determine different levels of conservation required to maintain environmental quality. The Multicriteria evaluation method was used as follows: i) applied fuzzy membership functions to standardization of the continuous data values or reclassified when categorical criteria; (ii) established criteria ranking through the pairwise relative importance comparison approach by the Analytical Hierarchy Process (AHP) method and; (iii) performed Weighted Linear Combination (WLC). The selected criteria were maps of the: land cover obtained by supervised classification of a satellite image, with 94% of Kappa Index of Agreement (KIA); soil types, slope; distances from rivers, roads; railways and urban limits. A main outcome of the criteria evaluated is a map of continuous data values expressing distinct levels of environmental conservation requirements. The highest values that express the need for conservation occurred near the ridgetop, corresponding to forest land cover, high slope and hydromorphic soils. The lowest values were observed in the peri-urban areas, in more stable soil and soil cover with a higher degree of occupation. It is concluded that the resulting map can assist in decision-making regarding proper management of the area, to achieve sustainability in the application of occupation policies.

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Section: Resultsmentioning

confidence: 96%

Section: Resultsmentioning

confidence: 99%

Defining environmental conservation levels considering anthropic activity in the Uberaba River Basin protected area

Santos

Silva²,

Assis³

et al. 2019

Rev. ambiente água

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“…The variations in the meteorological conditions usually occur over a fairly long time, the amount of rainfall increased during this period under study and may have contributed to the FDC's shape. River form adjustments is a function of many factors, such as flow changes and related climate regime [23,59]. Higher flows are responsible for channel widening due to avulsion and sediment deposits.…”

Section: Effects Of Land Use and Climatementioning

confidence: 99%

Hydro-Morphological Characteristics Using Flow Duration Curve, Historical Data and Remote Sensing: Effects of Land Use and Climate

Langat

Kumar

Koech

et al. 2019

Water

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Ecohydrological changes in large rivers of the world result from a long history of humandimensions and climate. The increasing human population, intensified land use, and climate change haveled to a decline in the most critical aspect of achieving sustainable development, namely, that of waterresources. This study assessed recent hydromorphological characteristics of the tropical Tana River inKenya using flow duration curve, and geospatial techniques to gain a better understanding of humanimpacts over the last two decades and their consequences for new development projects. The results showthat all extremal peak, low, and mean discharges exhibited significant increasing trends over a period of17 years. Dam construction represents a 13% reduction of the maximum discharge and a 30% decrease inlow flows, while post-regulation hydrological changes indicated an increase of 56 and 40% of high flowsand low flows respectively. Dominant flow was observed to be higher for the current decade than theprevious decade, representing a rise of the dominant streamflow by 33%. The assessment of fourmorphologically active sites at the downstream reach showed channel adjustments which support thechanges in the flow regimes observed. The channel width increased by 8.7 and 1.9% at two sites butdecreased by 31.5 and 16.2% for the other two sites under study during the time period. The resultsunderscore the contribution of other main human modifications, apart from regulation, such as increasedwater abstraction and inter basin transfer, up-stream land use and anthropogenic climate change to assessthe ecohydrological status in this river basin. Such streamflow regime dynamics may have implicationson water resource management, riverine environments, and development of new water projects.

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“…Previous studies mainly focused on the identification of rivers with hydromorphological or physicochemical restoration priority [ 8 ], whereas few considered the biological restoration as the priority. Aquatic organisms, i.e., algae, macroinvertebrates and fish, play an important role in river ecosystems [ 9 ], and they reflect the long-term cumulative effects of environmental pressure on river ecosystems [ 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Priorization of River Restoration by Coupling Soil and Water Assessment Tool (SWAT) and Support Vector Machine (SVM) Models in the Taizi River Basin, Northern China

Fan

Guo

et al. 2018

IJERPH

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Identifying priority zones for river restoration is important for biodiversity conservation and catchment management. However, limited data due to the difficulty of field collection has led to research to better understand the ecological status within a catchment and develop a targeted planning strategy for river restoration. To address this need, coupling hydrological and machine learning models were constructed to identify priority zones for river restoration based on a dataset of aquatic organisms (i.e., algae, macroinvertebrates, and fish) and physicochemical indicators that were collected from 130 sites in September 2014 in the Taizi River, northern China. A process-based model soil and water assessment tool (SWAT) was developed to model the temporal-spatial variations in environmental indicators. A support vector machine (SVM) model was applied to explore the relationships between aquatic organisms and environmental indicators. Biological indices among different hydrological periods were simulated by coupling SWAT and SVM models. Results indicated that aquatic biological indices and physicochemical indicators exhibited apparent temporal and spatial patterns, and those patterns were more evident in the upper reaches compared to the lower reaches. The ecological status of the Taizi River was better in the flood season than that in the dry season. Priority zones were identified for different hydrological seasons by setting the target values for ecological restoration based on biota organisms, and the results suggest that hydrological conditions significantly influenced restoration prioritization over other environmental parameters. Our approach could be applied in other seasonal river ecosystems to provide important preferences for river restoration.

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Using a multi-criteria analysis to identify rivers with hydromorphological restoration priority: Braided rivers in the south-eastern Subcarpathians (Romania)

Cited by 14 publications

References 49 publications

Defining environmental conservation levels considering anthropic activity in the Uberaba River Basin protected area

Defining environmental conservation levels considering anthropic activity in the Uberaba River Basin protected area

Hydro-Morphological Characteristics Using Flow Duration Curve, Historical Data and Remote Sensing: Effects of Land Use and Climate

Priorization of River Restoration by Coupling Soil and Water Assessment Tool (SWAT) and Support Vector Machine (SVM) Models in the Taizi River Basin, Northern China

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